642762240455 has 8 divisors (see below), whose sum is σ = 771354602304. Its totient is φ = 514183183200.

The previous prime is 642762240433. The next prime is 642762240493. The reversal of 642762240455 is 554042267246.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 642762240455 - 2²⁰ = 642761191879 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3219551 + ... + 3413360.

It is an arithmetic number, because the mean of its divisors is an integer number (96419325288).

Almost surely, 2^642762240455 is an apocalyptic number.

642762240455 is a deficient number, since it is larger than the sum of its proper divisors (128592361849).

642762240455 is a wasteful number, since it uses less digits than its factorization.

642762240455 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6652297.

The product of its (nonzero) digits is 3225600, while the sum is 47.

The spelling of 642762240455 in words is "six hundred forty-two billion, seven hundred sixty-two million, two hundred forty thousand, four hundred fifty-five".